Database Mirroring Monitor is currently managing a connection to server instance '{0}' with different credentials than those ...

Database Mirroring Monitor is currently managing a connection to server instance '{0}' with different credentials than those specified.   It currently connects to this instance using:       {1}  The new credentials for connecting to this instance are:       {2}  Only one set of credentials can be stored for each server instance. Do you want to use the new or the current credentials when connecting to server instance '{0}'?